Improvement in grinding-mills



2 Sheets-Sheet l.

H. H. W I T T & B. L. S M I T H.

GRINDING MILL.

Paiented Apr118,1876.

lam

NPET'ERS, PHOTO-LITHOGRAPMEL WASHINGTON1 D. U.

2Sheets-S'neet2. H. H. WITT & B. L. SMITH.

GRINDING MILL. No.176,157. Patented Apr`1118, 1876.

H-PEERS, PHOITFLITNOGRAFHER, WASHINGTON. D C.

UNITED STATES HORACE H. WITT AND BENJAMIN L.

IMPROVEMENT IN SMITH, OF GADSDEN, ALABAMA.

GRINDING-MILLS.

Specication forming part of Letters Patent No. 176,l57, dated April 18, 1876; application filed March 30, 18,76.

To all whom it may concern Be it known that we, HORACE H. WITT Land BENJAMIN L. SMITH, of Gadsden, in the county ot' Etowah and State ot' Alabama, have invented certain new and useful Improvements in Grinding-Mills; and we do hereby declare that the following is a t'ull, clear, and exact description thereof, which will enable others skilled in the art to Which it appertains to make and use the same, reference being had to the accompanying drawings, and to the. letters of reference marked thereon, which form a part of this specification. Y

Our invention relates to that class of grind. ing-mills having a cylindrical burr or runner, and a segment-.il adjustable bed-stonepand the nature of our invention consists principally in the devices for adjusting the bedstone to the runner; and also in the combina tion of parts, as will be hereinafter more fully set forth. v

In theannexed drawing Figure 1 is a side elevation, and Fig. 2 is a plan view with the hopper removed.

A represents the frame of the grindingmill. B is the cylindrical runner, and O is the bed-stoneheld in the casing D.

Through the rear end of-the frame is passed a set screw, E, which bears against the back of the bed-stone casing D near the top, for adjusting the stone O to the runner.

From the front ot the casing D, on each side near the top, projects a rod, G, which passes through the top cross-bar at the front ofthe frame, and both rods are connected by a bar, H, through the center ot' which is passed a set-screw, I, to bear against sa-id top crossbar ot' the frame, by which means the bedstone is further adjusted as required.

On the rods G G is placed a spring, J, ad justed by means of nuts a a, which renders the bed-stone sufficiently yielding to allow any foreign hard substances that might be in the grain to pass down between the stones without injury to the same. The tension or elasticity of the spring J is regulated by the nuts a.

The bed-stone casing D has cross-bars Dl D secured on its under side, which bars project beyond the sides thereof into inclined guides K K, formed in the sides of the frame. These cross-bars are adjusted and supported by means of screw-rods L L, and thumb-nuts, b b, for holding the bed-stone to the runner.

M represents the hopper elevated above the machine. Under this hopper is a hinged shoe, N, provided on one side by a projecting arm, d, which is held by means of a spring, f, onto a knocker or eccentric, e, on the runnershaft for shaking the shoe. The amount ot' such shaking o1' agitation is regulated by means ot' a cord, fi, attached to the iront edge of the shoe, and connecting with a set-screw, h, in the hopper-supporting frame, so that by turning said set-screw the shoe can be raised or lowered to bring the arm d closer on or farther from the knocker e.

Having thus fully described our invention, what We claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the bed-stone casing 1)', of the rods G Gr, cross-bar H,.und setscrew I, for the purposes set forth.

2. The adjustable'spring J and nuts a., in combination with the rods G, and bed-stone casing D, for the purposes herein set forth.

3. The set-screw E in combination with the casing D, rods G, cross-bar Il, und set screw I, as and for the purposes set forth.

In testimony that we claim the foregoing as our own, we aflix our signatures in the presence ot' two witnesses.

HORACE H. WITT, BENJAMIN L. SMITH. Witne ses:

C. H. WATsoN, WILLIAM L. BRAMHALL, THOMAS B. SMITH, J oIIN C. LATIIAM. 

